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Production scientifique
(468) Production(s) de l'année 2016
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Shear-banding in wormlike micelles: Beware of elastic instabilities 
Auteur(s): Fardin Marc-Antoine, Casanellas Vilageliu L., Saint-Michel Brice, Manneville Sébastien, Lerouge Sandra
(Article) Publié:
Journal Of Rheology / Transactions Of The Society Of Rheology; Society Of Rheology -- Transactions, vol. 60 p.917 - 926 (2016)
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The problem of compactification in string theory
Auteur(s): Alexandrov S.
(Séminaires)
Saint-Petersburg State University (Saint-Petersburg, RU), 2016-12-27
Résumé: I'll present a review of what is known about effective low-energy theory arising as a result of compactification of string theory down to 4 dimensions. In particular, I'll discuss why Calabi-Yau manifolds naturally arise as internal compactification manifolds, what is known in this case about quantum corrections, and why these manifolds are not enough from the phenomenological point of view. If time permits, I'll also present basic facts about flux compactifications allowing to get more realistic models.
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D-instantons, mock modular forms and BPS partition functions
Auteur(s): Alexandrov S.
(Séminaires)
CERN (Geneve, SZ), 2016-10-04
Résumé: I'll discuss the modular properties of D3-brane instantons appearing in Calabi-Yau string compactifications. I'll show that the D3-instanton contribution to a certain geometric potential on
the hypermultiplet moduli space can be related to the elliptic genus of (0,4) SCFT. The modular properties of the potential imply that the elliptic genus associated with non-primitive divisors
of Calabi-Yau is only mock modular. I'll show how to construct its modular completion and to make manifest the modular invariance of the twistorial construction of D-instanton corrected hypermultiplet
moduli space.
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D-instantons, mock modular forms and BPS partition functions
Auteur(s): Alexandrov S.
(Séminaires)
Instituto Superior Técnico (Lisbonne, PT), 2016-06-06
Résumé: I will discuss the modular properties of D3-brane instantons appearing in Calabi-Yau string compactifications. I will show that the D3-instanton contribution to a certain geometric potential on the hypermultiplet moduli space can be related to the elliptic genus of (0,4) SCFT. The modular properties of the potential imply that the elliptic genus associated with non-primitive divisors of Calabi-Yau is only mock modular. I will show how to construct its modular completion and prove the modular invariance of the twistorial construction of D-instanton corrected hypermultiplet moduli space.
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D-instantons, mock modular forms and BPS partition functions
Auteur(s): Alexandrov S.
(Séminaires)
IHES (Bures-sur- Yvette, FR), 2016-05-24
Résumé: I'll discuss the modular properties of D3-brane instantons
appearing in Calabi-Yau string compactifications. I'll show that
the D3-instanton contribution to a certain geometric potential on
the hypermultiplet moduli space can be related to the elliptic
genus of (0,4) SCFT. The modular properties of the potential imply
that the elliptic genus associated with non-primitive divisors
of Calabi-Yau is only mock modular. I'll show how to construct
its modular completion and prove the modular invariance of the
twistorial construction of D-instanton corrected hypermultiplet
moduli space.
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Instantons, wall-crossing and quantum dilogarithm identities
Auteur(s): Alexandrov S.
(Séminaires)
LAPTh (Annecy, FR), 2016-01-29
Résumé: I'll review the phenomenon of wall-crossing in theories with N=2 supersymmetry and its relation to the instanton contributions to the low energy effective actions in gauge and string theories. In the latter case, it is relevant for the description of D-brane instantons. Adding NS5-brane instantons to the story, one arrives to considering certain generalized theta series. I'll derive the properties of these theta series following from the mutual consistency of wall-crossing, D-brane and NS5-brane instantons, and show how these results can be used to get a new type of quantum dilogarithm identities.
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Micro-plasticity and micro-viscoelastic deformation in oxides glasses
Auteur(s): Faivre A.
Conférence invité: GLASS SCIENCE DAY. 4th edition –“TOWARD DAMAGE RESISTANT GLASSES”. (Rennes, FR, 2016-02-24)
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